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기후물리 연구단
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Pacific Meridional Mode-Western North Pacific Tropical Cyclone Linkage Explained by Tropical Pacific Quasi-Decadal Variability

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Title
Pacific Meridional Mode-Western North Pacific Tropical Cyclone Linkage Explained by Tropical Pacific Quasi-Decadal Variability
Author(s)
Liu C.; Zhang W.; Malte F. Stuecker; Jin F.-F.
Publication Date
2019-11
Journal
GEOPHYSICAL RESEARCH LETTERS, v.46, no.22, pp. -
Publisher
AMER GEOPHYSICAL UNION
Abstract
© 2019. American Geophysical Union. All Rights Reserved.Previous studies argued that the Pacific Meridional Mode (PMM) impacts tropical cyclone (TC) genesis variability over the southeastern part of the western North Pacific (SE-WNP). Here, we find that the statistical relationship between PMM and SE-WNP TC genesis frequency is dominated by their co-variability on decadal timescales. The decadal component of the PMM exhibits very similar temporal and spatial features to quasi-decadal tropical Pacific sea surface temperature (SST) variability. The latter can affect SE-WNP TC activity via changes in both zonal vertical wind shear and low-level vorticity. In contrast, the interannual component of the PMM exhibits no statistically significant correlation with SE-WNP TC genesis. Furthermore, observations show that both interannual and decadal variability of SE-WNP TC activity are well correlated with the commonly used Niño3.4 El Niño-Southern Oscillation index. Thus, equatorial Pacific SST variability is the dominant source of SE-WNP TC activity predictability on different timescales
URI
https://pr.ibs.re.kr/handle/8788114/6795
ISSN
0094-8276
Appears in Collections:
Center for Climate Physics(기후물리 연구단) > Journal Papers (저널 논문)
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36. Pacific meridional mode–western North Pacific tropical cyclone linkage explained by tropical Pacific quasi-decadal variability.pdfDownload

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